PowerFactory and DSL models

Presentation at DTU

December 14, 2011

Torsten Lund

Three main simulation types

1. Electro Magnetic Transients (EMT) 1. All state variables of the system are modeled 2. Both AC and DC transients are considered 3. Suitable for simulation of fast transients

2. Root Mean Square (RMS) (Fundamental frequency) 1. Only the fundamental frequency part is considered. 2. The differential equations of the network are reduced to algebraic

equations by elimination of the corresponding state variables. 3. Machine fluxes, Machine rotor speeds and controllers are modeled as

state variables

3. Load Flow 1. An equilibrium where the derivatives of all state variables are zero is

found.

Different Power System Simulation Tools

EMT RMS LoadFlow

PSCAD® Yes (Yes) No

SIMPOW® Yes Yes Yes

PowerFactory® Yes Yes Yes

PSS/E® No Yes Yes

PowerFactory

• Power Factory is an integrated power system analysis tool from the German company DIgSILENT (DIgital SImuLator for Electrical NeTwork)

• The development of DIgSILENT software began in 1976.

• DIgSILENT Version 7 was the world’s first power system analysis software with an integrated graphical one-line interface.

• One of the other strengths of the program was the object oriented database structure.

Features (from their web site)

• Load Flow and Fault Analysis of complete AC/DC network representation, and allows meshed and mixed 1-, 2-, and 3-phase AC and/or DC networks to be modeled.

• Dynamic Simulation • EMT Simulation • Voltage Stability Analysis • Eigenvalue Analysis • System Identification • Protection Analysis: • Harmonic Analysis • Reliability Analysis • Production Planning • Contingency Analysis • Power Electronic Device Modeling • Grounding • A/D Interfacing • Interface for SCADA/GIS/NIS • Compatibility with other software systems such as PSS/E & PSS/U • Multi-User Database and User Accounting • Low Voltage Network Analysis • Distribution Network Optimization • IEC Cable Sizing • Advanced Tools: Optimal Power Flow and Production Planning

Data base structure

DIgSILENT GmbH

PowerFactory 14.1.2

Bechmarking

CDSG WKA, 30*1.5MW

Project: DENA Graphic: CDSG WP Date: 12/14/2011 Annex:

Rec Gen 3.2860.996-5.185

DC Bus 7.2601.1000.000

HV 110.4071.0042.813

Gen 3.3001.0000.000

MV 20.1711.009

-141.575

LV 3.3501.015

-138.551

G~WGen 30x1.5MW

45.004.0894.14

Tr1

-45.000.0089.67

45.004.4289.67

Ser

ies

Re.

.

-45.00-0.0090.37

45.004.0890.37

DC Capacitor

-0.000.00

Tr2

-45.00-4.4289.67

45.006.8389.67

V~

110kV Einspeisung

-45.000.00

PWM Generator-Side-45.00-0.00

45.000.00

PWM Grid-Side

45.006.83

-45.000.00

DIg

SILE

NT

Single line graphic

DSL-models

DIgSLENT Simulation language

Structure

Composite frames PWM Frame:

PLL_RElmPhi*

0

1

Power Meas_GridStaPqmea*

Power Meas_GenStaPqmea*

RectifierElmVsc*

0

1

2

3

InverterElmVsc*

0

1

2

3

E.ON ProtElmDsl*

0

1

2

Speed MeasurementElm*

MPTElmMpt*

Vdc-Q ControllerElmDsl*

Vdc_ref

Q_ref

0

1

2

3

4

5

0

1

DC VoltageStaVmea*

PLL_IElmPll*,ElmPhi*

0

1

Vac-P ControllerElmDsl*

Vac_ref

Vdc_ref

0

1

2

3

4

5

6

7

0

1

AC Grid VoltageStaVmea*

AC Gen VoltageStaVmea*

PWM Frame:

speed

sinref_I

cosref_I

cosref_R

sinref_R

iq_ref_R

id_ref_R

id_e

xt

Vac_Gen

P

P_ref

sw

iq_ext

Vdc

Q

iq_ref_I

id_ref_I

Vac_Grid

DIg

SILE

NT

Composite model

Vac-P Control:

-

-

Max0

1

PI Ctrl_limKP,TP

i_Max

i_Min

0

1

MeasFiltTfVac

MeasFiltTfP

MeasFiltTfVdc

PI CtrlKVdc,TVdc

i_Max

i_Min

PI CtrlKVac,TVac

i_Max

i_Min

-

-

absolute limite..

iMax

0

1

0

1

Vac-P Control:

2

6

7

1

0

1

4

5

3

0

dVac

P_Filt

Vac_Filt iqref

delta

V

idre

f2

dVdc

idre

f1

dP

idre

f

Vac

P

Vdc_F

sw

Vdc

id_ext

Vdc_ref

P_ref

Vac_ref

iq_ref

id_ref

DIg

SILE

NT

First order filter

Vac-P Control:

-

-

Max0

1

PI Ctrl_limKP,TP

i_Max

i_Min

0

1

MeasFiltTfVac

MeasFiltTfP

MeasFiltTfVdc

PI CtrlKVdc,TVdc

i_Max

i_Min

PI CtrlKVac,TVac

i_Max

i_Min

-

-

absolute limite..

iMax

0

1

0

1

Vac-P Control:

2

6

7

1

0

1

4

5

3

0

dVac

P_Filt

Vac_Filt iqref

delta

V

idre

f2

dVdc

idre

f1

dP

idre

f

Vac

P

Vdc_F

sw

Vdc

id_ext

Vdc_ref

P_ref

Vac_ref

iq_ref

id_ref

DIg

SILE

NT

Initialization

Vac-P Control:

-

-

Max0

1

PI Ctrl_limKP,TP

i_Max

i_Min

0

1

MeasFiltTfVac

MeasFiltTfP

MeasFiltTfVdc

PI CtrlKVdc,TVdc

i_Max

i_Min

PI CtrlKVac,TVac

i_Max

i_Min

-

-

absolute limite..

iMax

0

1

0

1

Vac-P Control:

2

6

7

1

0

1

4

5

3

0

dVac

P_Filt

Vac_Filt iqref

delta

V

idre

f2

dVdc

idre

f1

dP

idre

f

Vac

P

Vdc_F

sw

Vdc

id_ext

Vdc_ref

P_ref

Vac_ref

iq_ref

id_ref

DIg

SILE

NT

Defining events

Defining results to record

Initializing the model

Starting the simulation

Plotting the results